source4/auth/auth_sam_reply.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Convert a server info struct into the form for PAC and NETLOGON replies
   5
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004
   7    Copyright (C) Stefan Metzmacher <metze@samba.org>  2005
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "auth/auth.h"
  25 #include "libcli/security/security.h"
  26 #include "librpc/gen_ndr/ndr_netlogon.h"
  27 #include "auth/auth_sam_reply.h"
  28
  29 NTSTATUS auth_convert_server_info_sambaseinfo(TALLOC_CTX *mem_ctx,
  30                                               struct auth_serversupplied_info *server_info,
  31                                               struct netr_SamBaseInfo **_sam)
  32 {
  33         struct netr_SamBaseInfo *sam = talloc_zero(mem_ctx, struct netr_SamBaseInfo);
  34         NT_STATUS_HAVE_NO_MEMORY(sam);
  35
  36         sam->domain_sid = dom_sid_dup(mem_ctx, server_info->account_sid);
  37         NT_STATUS_HAVE_NO_MEMORY(sam->domain_sid);
  38         sam->domain_sid->num_auths--;
  39
  40         sam->last_logon = server_info->last_logon;
  41         sam->last_logoff =  server_info->last_logoff;
  42         sam->acct_expiry = server_info->acct_expiry;
  43         sam->last_password_change = server_info->last_password_change;
  44         sam->allow_password_change = server_info->allow_password_change;
  45         sam->force_password_change = server_info->force_password_change;
  46
  47         sam->account_name.string = server_info->account_name;
  48         sam->full_name.string = server_info->full_name;
  49         sam->logon_script.string = server_info->logon_script;
  50         sam->profile_path.string = server_info->profile_path;
  51         sam->home_directory.string = server_info->home_directory;
  52         sam->home_drive.string = server_info->home_drive;
  53
  54         sam->logon_count = server_info->logon_count;
  55         sam->bad_password_count = sam->bad_password_count;
  56         sam->rid = server_info->account_sid->sub_auths[server_info->account_sid->num_auths-1];
  57         sam->primary_gid = server_info->primary_group_sid->sub_auths[server_info->primary_group_sid->num_auths-1];
  58
  59         sam->groups.count = 0;
  60         sam->groups.rids = NULL;
  61
  62         if (server_info->n_domain_groups > 0) {
  63                 size_t i;
  64                 sam->groups.rids = talloc_array(sam, struct samr_RidWithAttribute,
  65                                                 server_info->n_domain_groups);
  66
  67                 if (sam->groups.rids == NULL)
  68                         return NT_STATUS_NO_MEMORY;
  69
  70                 for (i=0; i<server_info->n_domain_groups; i++) {
  71                         struct dom_sid *group_sid = server_info->domain_groups[i];
  72                         if (!dom_sid_in_domain(sam->domain_sid, group_sid)) {
  73                                 /* We handle this elsewhere */
  74                                 continue;
  75                         }
  76                         sam->groups.rids[sam->groups.count].rid =
  77                                 group_sid->sub_auths[group_sid->num_auths-1];
  78
  79                         sam->groups.rids[sam->groups.count].attributes =
  80                                 SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
  81                         sam->groups.count += 1;
  82                 }
  83         }
  84
  85         sam->user_flags = 0; /* w2k3 uses NETLOGON_EXTRA_SIDS | NETLOGON_NTLMV2_ENABLED */
  86         sam->acct_flags = server_info->acct_flags;
  87         sam->logon_server.string = server_info->logon_server;
  88         sam->domain.string = server_info->domain_name;
  89
  90         ZERO_STRUCT(sam->unknown);
  91
  92         ZERO_STRUCT(sam->key);
  93         if (server_info->user_session_key.length == sizeof(sam->key.key)) {
  94                 memcpy(sam->key.key, server_info->user_session_key.data, sizeof(sam->key.key));
  95         }
  96
  97         ZERO_STRUCT(sam->LMSessKey);
  98         if (server_info->lm_session_key.length == sizeof(sam->LMSessKey.key)) {
  99                 memcpy(sam->LMSessKey.key, server_info->lm_session_key.data,
 100                        sizeof(sam->LMSessKey.key));
 101         }
 102
 103         *_sam = sam;
 104
 105         return NT_STATUS_OK;
 106 }
 107
 108 /* Note that the validity of the _sam3 structure is only as long as
 109  * the server_info it was generated from */
 110 NTSTATUS auth_convert_server_info_saminfo3(TALLOC_CTX *mem_ctx,
 111                                            struct auth_serversupplied_info *server_info,
 112                                            struct netr_SamInfo3 **_sam3)
 113 {
 114         struct netr_SamBaseInfo *sam;
 115         struct netr_SamInfo3 *sam3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
 116         NTSTATUS status;
 117         size_t i;
 118         NT_STATUS_HAVE_NO_MEMORY(sam3);
 119
 120         status = auth_convert_server_info_sambaseinfo(mem_ctx, server_info, &sam);
 121         if (!NT_STATUS_IS_OK(status)) {
 122                 return status;
 123         }
 124         sam3->base = *sam;
 125         sam3->sidcount  = 0;
 126         sam3->sids      = NULL;
 127
 128
 129         sam3->sids = talloc_array(sam, struct netr_SidAttr,
 130                                   server_info->n_domain_groups);
 131         NT_STATUS_HAVE_NO_MEMORY(sam3->sids);
 132
 133         for (i=0; i<server_info->n_domain_groups; i++) {
 134                 if (dom_sid_in_domain(sam->domain_sid, server_info->domain_groups[i])) {
 135                         continue;
 136                 }
 137                 sam3->sids[sam3->sidcount].sid = talloc_reference(sam3->sids,server_info->domain_groups[i]);
 138                 sam3->sids[sam3->sidcount].attributes =
 139                         SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
 140                 sam3->sidcount += 1;
 141         }
 142         if (sam3->sidcount) {
 143                 sam3->base.user_flags |= NETLOGON_EXTRA_SIDS;
 144         } else {
 145                 sam3->sids = NULL;
 146         }
 147         *_sam3 = sam3;
 148
 149         return NT_STATUS_OK;
 150 }
 151
 152 /**
 153  * Make a server_info struct from the info3 returned by a domain logon
 154  */
 155 NTSTATUS make_server_info_netlogon_validation(TALLOC_CTX *mem_ctx,
 156                                               const char *account_name,
 157                                               uint16_t validation_level,
 158                                               union netr_Validation *validation,
 159                                               struct auth_serversupplied_info **_server_info)
 160 {
 161         struct auth_serversupplied_info *server_info;
 162         struct netr_SamBaseInfo *base = NULL;
 163         uint32_t i;
 164
 165         switch (validation_level) {
 166         case 2:
 167                 if (!validation || !validation->sam2) {
 168                         return NT_STATUS_INVALID_PARAMETER;
 169                 }
 170                 base = &validation->sam2->base;
 171                 break;
 172         case 3:
 173                 if (!validation || !validation->sam3) {
 174                         return NT_STATUS_INVALID_PARAMETER;
 175                 }
 176                 base = &validation->sam3->base;
 177                 break;
 178         case 6:
 179                 if (!validation || !validation->sam6) {
 180                         return NT_STATUS_INVALID_PARAMETER;
 181                 }
 182                 base = &validation->sam6->base;
 183                 break;
 184         default:
 185                 return NT_STATUS_INVALID_LEVEL;
 186         }
 187
 188         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 189         NT_STATUS_HAVE_NO_MEMORY(server_info);
 190
 191         /*
 192            Here is where we should check the list of
 193            trusted domains, and verify that the SID
 194            matches.
 195         */
 196         server_info->account_sid = dom_sid_add_rid(server_info, base->domain_sid, base->rid);
 197         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
 198
 199
 200         server_info->primary_group_sid = dom_sid_add_rid(server_info, base->domain_sid, base->primary_gid);
 201         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
 202
 203         server_info->n_domain_groups = base->groups.count;
 204         if (base->groups.count) {
 205                 server_info->domain_groups = talloc_array(server_info, struct dom_sid*, base->groups.count);
 206                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups);
 207         } else {
 208                 server_info->domain_groups = NULL;
 209         }
 210
 211         for (i = 0; i < base->groups.count; i++) {
 212                 server_info->domain_groups[i] = dom_sid_add_rid(server_info, base->domain_sid, base->groups.rids[i].rid);
 213                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups[i]);
 214         }
 215
 216         /* Copy 'other' sids.  We need to do sid filtering here to
 217            prevent possible elevation of privileges.  See:
 218
 219            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 220          */
 221
 222         if (validation_level == 3) {
 223                 struct dom_sid **dgrps = server_info->domain_groups;
 224                 size_t sidcount = server_info->n_domain_groups + validation->sam3->sidcount;
 225                 size_t n_dgrps = server_info->n_domain_groups;
 226
 227                 if (validation->sam3->sidcount > 0) {
 228                         dgrps = talloc_realloc(server_info, dgrps, struct dom_sid*, sidcount);
 229                         NT_STATUS_HAVE_NO_MEMORY(dgrps);
 230
 231                         for (i = 0; i < validation->sam3->sidcount; i++) {
 232                                 dgrps[n_dgrps + i] = talloc_reference(dgrps, validation->sam3->sids[i].sid);
 233                         }
 234                 }
 235
 236                 server_info->n_domain_groups = sidcount;
 237                 server_info->domain_groups = dgrps;
 238
 239                 /* Where are the 'global' sids?... */
 240         }
 241
 242         if (base->account_name.string) {
 243                 server_info->account_name = talloc_reference(server_info, base->account_name.string);
 244         } else {
 245                 server_info->account_name = talloc_strdup(server_info, account_name);
 246                 NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
 247         }
 248
 249         server_info->domain_name = talloc_reference(server_info, base->domain.string);
 250         server_info->full_name = talloc_reference(server_info, base->full_name.string);
 251         server_info->logon_script = talloc_reference(server_info, base->logon_script.string);
 252         server_info->profile_path = talloc_reference(server_info, base->profile_path.string);
 253         server_info->home_directory = talloc_reference(server_info, base->home_directory.string);
 254         server_info->home_drive = talloc_reference(server_info, base->home_drive.string);
 255         server_info->logon_server = talloc_reference(server_info, base->logon_server.string);
 256         server_info->last_logon = base->last_logon;
 257         server_info->last_logoff = base->last_logoff;
 258         server_info->acct_expiry = base->acct_expiry;
 259         server_info->last_password_change = base->last_password_change;
 260         server_info->allow_password_change = base->allow_password_change;
 261         server_info->force_password_change = base->force_password_change;
 262         server_info->logon_count = base->logon_count;
 263         server_info->bad_password_count = base->bad_password_count;
 264         server_info->acct_flags = base->acct_flags;
 265
 266         server_info->authenticated = true;
 267
 268         /* ensure we are never given NULL session keys */
 269
 270         if (all_zero(base->key.key, sizeof(base->key.key))) {
 271                 server_info->user_session_key = data_blob(NULL, 0);
 272         } else {
 273                 server_info->user_session_key = data_blob_talloc(server_info, base->key.key, sizeof(base->key.key));
 274                 NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
 275         }
 276
 277         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 278                 server_info->lm_session_key = data_blob(NULL, 0);
 279         } else {
 280                 server_info->lm_session_key = data_blob_talloc(server_info, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 281                 NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
 282         }
 283
 284         ZERO_STRUCT(server_info->pac_srv_sig);
 285         ZERO_STRUCT(server_info->pac_kdc_sig);
 286
 287         *_server_info = server_info;
 288         return NT_STATUS_OK;
 289 }
 290